How can I change the font and background colors?

Use the context menu (right-click) for each window. It also works for the main log window. You can also use your mouse wheel while holding the Ctrl key to modify the font size on the fly (a la Mozilla/Firefox).

How can I change threshold for off-time calculation?

Open the rate Window (ALT-R), open the context menu (right-click on the rate window),
there is a menu point "offtime -> calculation threshold". The threshold can be set
to 10,20,30,40,50,60 or a custom value between 1 and 120 minutes.

If your logging software allows imports from ADIF (Amateur Data Interchange Format) files, there should be no problem. If it does not manage it, ask the author of YOUR favorite logging software to support it, or use another software.

Do I have to set my machine in UTC?

No, Win-Test does not care. On the other hand, the time zone must be correctly set.

I want to enter a post-contest log in Win-Test. How can I enter the date and the time of QSO?

Win-Test is not really adapted to that. You should try to type while contesting. You should make it very quickly. However, it is possible to use the "Edit/Date and time of the QSO" menu (Alt+F shortcut).

There is no CW signal on the parallel port.

Check, in the interface settings, if the parallel port adress is correctly set. If you use WinNT/2000/XP, check also if DLPORTIO.SYS is installed. If not, you can find it here: http://download.win-test.com/port95nt.exe

When using CW with WT, it sometimes chokes. What can I do?

It is advised in this case to stop the execution of some programs which are not essential to you during the contest. In particular antivirus software. Furthermore, under some OS (WinNT, Win2K or WinXP), logging with an administrator account is advised.

Can I set myself a contest in Win-Test?

Currently, it is not possible. Win-test is designed to fit contests to the closest. Each competition has its specifics, and rather than to make an universal tool, the author prefers WT to support fewer contests, but better than the other existing software.

I have a question. What should I do?

Use the mailing list.

I asked a question directly to the author and I did not have an answer!

Bad choice. Use the mailing list instead.

I would like such and such features!

Suggest them! Use the mailing list. We will then see what we can do...

Where can I read the archives of this mailing list you do not stop talking about?